Cannot get the USB installer to open on my PC (flashing underscore).

Using an Intel Core i5-2400 on a ThinkCentre M81 board attempting to install High Sierra. The USB drive boots on a Mac, surprisingly enough, but I can't boot it on the PC - it gets stuck on a flashing line. I asked for help on the Discord but didn't get much a response, which is understandable. I followed the Vanilla guide for Ivy Bridge. What should I do? I can upload config.plist and whatnot if necessary.

My system is set to only boot from UEFI. However it sees legacy and UEFI drives, just exclusively boots UEFI.

submitted by /u/MarioMover2
[link] [comments]